If you want to give your user a fun fortune, you can do that too.
$ sudo singularity build fortune.sif SingularityAnd now see your fortune on shell!
$ singularity shell fortune.sif
Singularity: Invoking an interactive shell within container...
In India, "cold weather" is merely a conventional phrase and has come into
use through the necessity of having some way to distinguish between weather
which will melt a brass door-knob and weather which will only make it mushy.
-- Mark TwainIt's much more fortuitous if it comes from the lolcow! You can see the Singularity.lolcow recipe for this example:
$ sudo singularity build lolcow.sif Singularity.lolcow